The people of the Tri-Cities have named Southridge Dental and Dr. Sean Simper as winners in the Tri-City Herald’s People’s Choice Awards for “Best Dentist Office” and “Best Dentist” in Kennewick, Richland and Pasco.Our professional and courteous family dentist specializes in the prevention, diagnosis and treatment of various dental conditions. Although general dentists provide primarily preventative care and minor restorative therapy, they often are able to perform a wide array of dental procedures.